chore(gh-pr): clean up PR template text
chore(gh-pr): clean up PR template text

The "Questions?" section is supposed to be there for the submitter to see, not everyone when they make the PR (otherwise it makes it look like the author is saying feel free to ask questions on Slack).
rgbkrk/nteract,0u812/nteract,nteract/composition,nteract/nteract,nteract/nteract,rgbkrk/nteract,temogen/nteract,captainsafia/nteract,rgbkrk/nteract,temogen/nteract,jdetle/nteract,jdetle/nteract,rgbkrk/nteract,nteract/composition,jdfreder/nteract,0u812/nteract,nteract/nteract,jdfreder/nteract,jdetle/nteract,rgbkrk/nteract,0u812/nteract,nteract/nteract,nteract/nteract,0u812/nteract,nteract/composition,captainsafia/nteract,jdfreder/nteract,temogen/nteract,jdetle/nteract,captainsafia/nteract,jdfreder/nteract,captainsafia/nteract